If you must have 7 players then I recommend these:
Citadels - it's cut throat, but a lot of fun. It still gets requested. Wouldn't play with less than 5.
7 Wonders - plays almost as fast with 7 players as it does with 3. Playing this New Years with a large group.
Bohnanza - very interactive and fun if you have 5-7 players.
With 4-6 players I would recommend these:
Power Grid - lots of different maps in expansions for lots of variety
Alhambra - not for everyone, but some people love it
Show Manager - out of print forever, but just got reprinted. Highly recommended.
Tribune - need the expansion for 6 players, but this one is subtle and you need to play it a couple of times to get it.
For 4-5 players these are excellent choices:
Caylus - excellent worker placement game
Boomtown - fun little cut throat card game
St. Petersburg - need the expansion for 5, but this is a great one.
Go to boardgamegeek.com and you will be able to read about these games, see where they are rated and read reviews about how they play. It's a helpful site and will save you money.
Munchkin is fun (max 6 players).
Talisman is nice.
Smallworld is cool (5 players max)
Thunderstone (deck managing 2-6 players - solo mode possible)...
Carcassonne.
History of the World (a new version now exists)...
I'm sorry, but I wouldn't be able to recommend many of your choices. Munchkin is a horrible game and once the humor is gone after the first play there is nothing left. Talisman is a bunch of die rolling, moving around, not much happens, repeat forever and play for 6 hours. A good game 20 years a go when choices were limited, but not now. History of the World is another long game and more for wargamers. I've introduced Carcassonne to 7+ players and none of them wanted to play it again. Some people love it, but I sold it.
